Spero Therapeutics Inc. (SPRO)
Showing Closing Date Range from Jul 28 to Oct 26, 2026 compared to Apr 28 to Jul 27, 2026.
Compare Last 3 Months with Previous Period
Investor Relations:investors.sperotherapeutics.com
Current Period Close
$1.07
Jul 28, 2026 - Oct 26, 2026
Previous Period Close
$1.18
Apr 28, 2026 - Jul 27, 2026
Net Comparison Delta
$-0.11 (-9.32%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(60 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 26, 2026 | $1.07 | Jul 23, 2026 | $1.16 | -7.76% |
| Oct 23, 2026 | $1.11 | Jul 22, 2026 | $1.27 | -12.60% |
| Oct 22, 2026 | $1.13 | Jul 21, 2026 | $1.38 | -18.12% |
| Oct 21, 2026 | $1.17 | Jul 20, 2026 | $1.44 | -18.75% |
| Oct 20, 2026 | $1.22 | Jul 17, 2026 | $1.58 | -22.78% |
| Oct 19, 2026 | $1.12 | Jul 16, 2026 | $1.57 | -28.66% |
| Oct 16, 2026 | $1.10 | Jul 15, 2026 | $1.70 | -35.29% |
| Oct 15, 2026 | $1.13 | Jul 14, 2026 | $1.70 | -33.53% |
| Oct 14, 2026 | $1.12 | Jul 13, 2026 | $2.18 | -48.62% |
| Oct 13, 2026 | $1.15 | Jul 10, 2026 | $2.10 | -45.24% |
| Oct 12, 2026 | $1.18 | Jul 09, 2026 | $2.12 | -44.34% |
| Oct 09, 2026 | $1.20 | Jul 08, 2026 | $2.17 | -44.70% |
| Oct 08, 2026 | $1.14 | Jul 07, 2026 | $2.16 | -47.22% |
| Oct 07, 2026 | $1.17 | Jul 06, 2026 | $2.19 | -46.58% |
| Oct 06, 2026 | $1.19 | Jul 02, 2026 | $2.20 | -45.91% |
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